Name
trace_irq_handler_entry —
called immediately before the irq action handler
Synopsis
void trace_irq_handler_entry ( | int irq, |
| | struct irqaction * action); |
Arguments
irq
irq number
action
pointer to struct irqaction
Description
The struct irqaction pointed to by action contains various
information about the handler, including the device name,
action->name, and the device id, action->dev_id. When used in
conjunction with the irq_handler_exit tracepoint, we can figure
out irq handler latencies.